Ds\PriorityQueue::pop

(PECL ds >= 1.0.0)

Ds\PriorityQueue::pop — Removes and returns the value with the highest priority

说明

public Ds\PriorityQueue::pop ( void ) : mixed

Removes and returns the value at the front of the queue, ie. the value with the highest priority.

Note:
Values with equal priority fall back to FIFO (first in first out).

参数

此函数没有参数。

返回值

The removed value which was at the front of the queue.

错误／异常

UnderflowException if empty.

范例

Example #1 Ds\PriorityQueue::pop() example


<?php
$queue = new \Ds\PriorityQueue();

$queue->push("a",  5);
$queue->push("b", 15);
$queue->push("c", 10);

print_r($queue->pop());
print_r($queue->pop());
print_r($queue->pop());
?>

以上例程的输出类似于：

string(1) "a"
string(1) "b"
string(1) "c"